Robtex

Up: 24.33.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 24.33.244.0/23
Down right: 24.33.246.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
24.33.244.100	PTR	virtual.cscf-lb-01-den01.ims.rr.com
24.33.244.100	PTR	den01-scscf.ims.rr.com
24.33.244.100	PTR	den01-bgcf.ims.rr.com
24.33.244.104	A+PTR	den02-scscf.ims.rr.com
24.33.244.104	PTR	den02-icscf.ims.rr.com
24.33.244.104	A+PTR	den02-pcscf.ims.rr.com
24.33.246.44	PTR	cpe-24-33-246-44.mi.res.rr.com
24.33.246.74	A	xspca.spectrumenterprise.net
24.33.246.114	A+PTR	vm01.hv.rr.com
24.33.247.161	PTR	cpe-24-33-247-161.mi.res.rr.com